A world map displays migrant deaths by city, with circle size proportional to the total dead and missing. A date histogram below shows the temporal distribution of these deaths, and users can brush over a time range to filter the map to only show cities with deaths in that period. The visualization uses React with D3 v5, employing `d3.geoNaturalEarth1` and `d3.geoPath` for the map, `d3.scaleSqrt` for circle sizing, and `d3.brushX` for interactive selection. Data comes from a CSV of migrant deaths, and country boundaries are rendered from the World Atlas TopoJSON.